APA (7th ed.) Citation

Epstein, D. G. (2009). Letters. Army Magazine, 59(6), 2.

Chicago Style (17th ed.) Citation

Epstein, David G. "Letters." Army Magazine 59, no. 6 (2009): 2.

MLA (9th ed.) Citation

Epstein, David G. "Letters." Army Magazine, vol. 59, no. 6, 2009, p. 2.